On the same Vietnam trip per my other topic, had a "professional" massage by some blind guys who rely on the income from massage to survive.If your shy you don't need to be as these guys cannot see you, so you just have a towel (or not) when being massaged.They have a room with about 4 beds and some curtains between, sometimes open or not. As I was with my boyfriend ours were open to each other.There was one other guy having a massage with a curtain drawn but when standing next to my bed could see him watching a video on his phone as he was massaged.My boyfriend was first, as I had to wait for another blind masseur to arrive so I just stood watching, and peeking a look at the cute Asian guy behind the curtain An older Asian guy came in wearing only a towel after his steam room, and me being western, he came towards me and shook my hand saying hello. He then said hello to my boyfriend who at this time was face down.This older guy then went behind the curtain to check out the cute guy being massaged. I noticed he lingered a bit and I was interested in what he was doing.To my surprise he was rubbing his butt and sliding a finger along his crack. He would then leave the room for 5 minutes then come back.As my boyfriend was busy enjoying the back massage I crept around the curtain also to see this cute guys ass as he was being massaged. The older guy cam in and then proceed to kiss the guys ass, and lick into the crack. I went hard as a rock immediately. The older guy saw this and took my cock and started stroking it through the towel for a few minutes then went back to the ass he was tasting. I went back to stand watching my bf.About this time my masseur came in, and made his way to my table and motioned for me to lay face down.As I was doing this my bf was turning over for his front massage. The older guy cam e over to him and started rubbing my boyfriends cock through his towel. Quite erotic to watch and my boyfriend went hard. I told him to enjoy himself. The older guy then removed the towel (all while the blind masseur was massaging my boyfriend). He stroked my bf then deep throated his cock. My bf was having his cock sucked right next to me. He was enjoying it. I told him to cum if he wanted. So he let the older guy keep blowing him until he unloaded in his mouth. The older guy just swallowed it all, smiled at me then walked out.I was hard as a rock!I know its weird when this happens with your boyfriend but when you are in a stable relationship it can be erotic and sexually motivating. Anyone else feel this can be stimulating in a relationship?